Dupli-color spray bed liner, anyone use it?

[purple gas]

Like the sign says. By box ( if it has a floor & 4 sides it's a box-- It's a Canadian thing ) so, my box looks pretty ratty and it's drivin me nuts. I was thinkin of just painting it but saw the Dupli-Color stuff and wonderd if it was any good? how many cans to do the inside of a long box? ( there's that word again ) how it looks and how permenant it is. If I just paint it later I could do a decent job.